Silicon deposit distribution

The abundance of silicon intrigued early chemists. The content of silicon (silicon) on the earth's surface is second only to oxygen, accounting for nearly 28%. However, silicon (silicon) is not the first element to be discovered, because it is necessary to reduce silicon from silicon (silicon) oxides. A very difficult thing.

Silicon accounts for about 25.7% of the total weight of the earth's crust, second only to oxygen. In nature, silicon usually exists in the form of oxygen-containing compounds, the simplest of which is silica SiO2, a compound of silicon and oxygen. Quartz, crystal, etc. are variations of pure silica. The silicon-oxygen compounds in ores and rocks are collectively referred to as silicates, the more important ones are feldspar KAlSi3O8, kaolin Al2Si2O5(OH)4, talc Mg3(Si4O10)(OH)2, mica KAl2(AlSi3O10)(OH)2, asbestos H4Mg3Si2O9 , sodium zeolite Na2 (Al2Si3O10) · 2H2O, garnet Ca3Al2 (SiO4) 3, zirconium quartz ZrSiO4 and beryl Be3Al2Si6O18 and so on. Soil, clay and sand are the weathering products of natural silicate rocks. [1]

Silicon is widely distributed in nature, with an atomic percentage of 16.7% in the earth's crust. It is a basic element of rock minerals and occurs in quartz sand and silicate.

Silicon is the most abundant element in the earth's crust except for oxygen. If carbon is the basis of all organic life, then silicon occupies the same place for the earth's crust, which is made up of mostly silicon-containing rock layers. These rocks are almost entirely composed of silica and various silicates. Feldspar, mica, clay, olivine, amphibole, etc. are all silicates; crystal, agate, sapphire, opal, quartz, sand, and flint are all silica.